function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		work_09_over = newImage("images/work_09-over.gif");
		work_10_over = newImage("images/work_10-over.gif");
		work_11_over = newImage("images/work_11-over.gif");
		work_18_over = newImage("images/work_18-over.gif");
		work_27_over = newImage("images/work_27-over.gif");
		preloadFlag = true;
	}
}

function Check_phone(input)
{
  var ok = true;
    for (var i = 0; i < input.length; i++) 
	{
	  var chr = input.charAt(i);
      var found = false;
      for (var j = 0; j < 13; j++) 
	  {
        if (j<10) ch=j;
	    if (j==10) ch=" ";
	    if (j==11) ch="/";
	    if (j==12) ch="-";
	    if (chr == ch) found = true;	  
      }
	  if (!found) ok = false;
    }
  return ok;
}
function Check_pass(input,inp)
{
  if (!Check_empty(input)) return false;
  if (!Check_empty(inp)) return false;
  if (!(input==inp)) return false;
  return true;
}
function Check_kolvo(input)
{
  var ok = true;
    for (var i = 0; i < input.length; i++) 
	{
	  var chr = input.charAt(i);
      var found = false;
      for (var j = 0; j <10; j++) 
	  {
        ch=j;
        if (chr == ch) found = true;	  
      }
	  if (!found) ok = false;
    }
  return ok;
}
function Check_empty(input)
{
  return (input.length>0);
}
function Check_email(input)
{
  if ((input.indexOf ('@') == -1) || (input.indexOf ('.') == -1))
  return false;
  return true;
}